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    • 21. 发明申请
    • APPARATUS AND METHOD FOR DETECTING DISCONNECTION OF AN INTRAVASCULAR ACCESS DEVICE
    • 用于检测血管内接入装置的分离的装置和方法
    • WO2011053810A2
    • 2011-05-05
    • PCT/US2010/054772
    • 2010-10-29
    • DEKA PRODUCTS LIMITED PARTNERSHIPWILT, Michael, J.SACHS, Jason, M.GRANT, Kevin, L.
    • WILT, Michael, J.SACHS, Jason, M.GRANT, Kevin, L.
    • A61M1/36G01N27/07
    • A61M1/3656A61M1/3653A61M1/3655A61M1/3659A61M2205/3317G01N27/07G01R27/14
    • An apparatus and method are disclosed for detecting the disconnection of a vascular access device such as a needle, cannula or catheter from a blood vessel or vascular graft segment. A pair of electrodes is placed in direct contact with fluid or blood in fluid communication with the vascular segment. In one embodiment, the electrodes are incorporated into a pair of connectors connecting arterial and venous catheters to arterial and venous tubes leading to and from an extracorporeal blood flow apparatus. Wires leading from the electrodes to a detecting circuit can be incorporated into a pair of double lumen arterial and venous tubes connecting the blood flow apparatus to the blood vessel or vascular graft. The detecting circuit is configured to provide a low-voltage alternating current signal to the electrodes to measure the electrical resistance between the electrodes, minimizing both the duration and amount of current being delivered. Detection of an increase in electrical resistance between the electrodes exceeding a pre-deteπnined threshold value may be used to indicate a possible disconnection of the vascular access device.
    • 公开了一种用于检测诸如针,套管或导管的血管进入装置与血管或血管移植段的断开的装置和方法。 一对电极放置成与流体或与血管段流体连通的血液直接接触。 在一个实施例中,电极结合到一对连接器中,连接器将动脉导管和静脉导管连接到通往和来自体外血流设备的动脉管和静脉管。 从电极引导到检测电路的导线可以被结合到将血流装置连接到血管或血管移植物的一对双腔动脉管和静脉管中。 检测电路被配置为向电极提供低压交流信号以测量电极之间的电阻,从而使输送的电流的持续时间和量两者最小化。 检测到电极之间的电阻增加超过预先确定的阈值可以用于指示血管通路装置可能的断开。